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(1) 第一题:
Which of the following is true, according to the passage? A. A million stars fill the night sky. B. All stars shine with the same intensity. C. Many stars are about the same age. D. Shorter wavelength stars are brighter. 答案:
D. Shorter wavelength stars are brighter。
解析:
文中指出,蓝色恒星具有更大的能量和亮度,比较短波长的恒星更亮。
(2) 第二题:
What would happen to a star over time? A. Its age will decrease. B. Its color will change. C. Its brightness will increase. D. Its temperature will rise. 答案:
D. Its temperature will rise。
解析:
文中指出,随着恒星从初始光谱类型到终极光谱类型的转变,其温度也会不断升高。